End cap for an electric high voltage fuse
AssigneeHazemeijer B.V.
InventorDerk van der Scheer
Life of this patent
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Abstract
A tubular shaped high voltage fuse, with a support tube of insulating material, having applied thereon parallel fuse conductors, and an outer tube of insulating material, surrounding the support tube. The end cap consists of a cup-shaped electrically conducting cap to be placed upon the ends of the support tube and the outer tube, a tore-shaped, closed helical contact spring of electrically conducting material to be placed around the support tube end for connecting the fuse conductors with the cap and a spacing piece of insulating material having resilient strips connected therewith for compensating tolerance deviations and for centering, together with the helical spring, the support tube within the outer tube.
Claims17
A tubular-shaped high voltage fuse, adapted to be filled with sand, comprising at least one first support tube of electrically insulating material, having applied thereon parallel fuse conductors running between the ends thereof, and an outer tube of electrically insulating material, surrounding said support tube, comprising:
- (a) a cup-shaped end cap of electrically conducting material, closed at one of its ends, the open end of which can be slipped over one end of said outer tube and can be fixed thereupon;
- (b) a first tore-shaped, closed contact spring of electrically conducting and resilient material, which can be placed between the outer wall at one end of said support tube, in electrical contact with said fuse conductors and the inner wall of said end cap, said contact spring is dimensioned such, that after said end cap has been mounted, the center line of the support tube mainly will be kept in coincidence with the center line of said outer tube;
- and
- (c) a spacing piece, comprising a lid to be placed on the open end of the support tube, said lid includes resilient strips at its side facing away from said support tube and extending from said side, which strips, after said end cap has been placed on the open end, are resiliently deformed when in contact with the wall of said closed cap end, pressing said lid against said support tube.
Dependencies are inferred from the claim text.